Question

Q6-(5)-Name the members of alkali metal group which has the :

Largest atomic volume

Answer 1

The Alkali metal group is group 1 of the periodic table which has the following elements:

Hydrogen (H) Lithium (Li) Sodium (Na) Potassium (K) Rubidium (Rb) Cesium (Cs) Francium (Fr)

The volume of the atom is directly proportional to the size of the atom or atomic radii.

Periodic trend:

The atomic radii increase down the group due to an increase in the number of shells.

Hence, the bottom-most element will have the highest atomic volume which is Cesium in this case.

(Francium is not considered as it is a radioactive element).